It is no surprise field engineers and project managers need to constantly deal with limited budget and given the requirement to upgrade to a fast and non-interruption IP-based system. As an alternative to investing in new cables for system upgrades, Ethernet extenders are a great choice due to its flexibility for linking devices together over long distances using existing copper wiring. The significant advantage of using DSL Ethernet extenders is relatively inexpensive to deploy and the required physical medium, copper wire, is practically everywhere; This allows you as a field engineer quickly extend a point-to-point connection between two geographically separated LANs. And because of this, you can easily take the legacy system, and transform it into a modern network, while saving time and money.



Existing copper wire infrastructures can be used to establish high-speed Ethernet networks and can extend transmission distances to exceed those previously attained with traditional DSL connections. Variations of DSL technology, such as G.SHDSL (symmetric high-speed digital subscriber line) for long-distance communication and VDSL2 (very-high-bit-rate digital subscriber line 2) for high-bandwidth applications, have since emerged to meet specific transmission distance and data rate requirements of various industrial applications. For example, VDSL2 extenders can provide enough bandwidth for 5 video streams with 1280 x 720 HD video resolution (H.264 @ 30 fps) across a distance of one kilometer.



The quick and easy answer, IEX-402-VDSL2 was designed to keep user in mind.

Making DSL Deployments are not without its challenges. After initial installation or during routine maintenance, system engineers will generally perform a test to verify connectivity. When communication is unable to be established between the DSL Ethernet extenders, determining the root cause can be quite an inconvenience, considering the fact that DSL Ethernet extenders will only work in pairs and the distance between the extenders can span several kilometers. Without another engineer present at the opposite end of the DSL connection to verify device configurations and make corresponding adjustments, one engineer will likely need to travel between the extenders repeatedly when communication issues arise on the DSL segment. Different applications will have many requirements and encounter unpredictable environments with variable line conditions; identifying the precise relationships between these variable factors in every possible scenario would be nearly impossible.

Let’s take a look at a few common problematic scenarios in which operators and engineers can encounter connectivity issues during deployment, and how IEX series DSL Ethernet extenders have evolved to help overcome these challenges.

Auto-Pairing (CO/CPE Configuration)

Communication failure can be caused by improper settings (usually DIP switches) on the DSL Ethernet extender pair. Similar to traditional DSL service from the phone company, DSL Ethernet extender pairs will need to have one Ethernet extender designated as the CO (central office) device and the other Ethernet extender designated as the CPE (customer premise equipment) device. CO/CPE settings should first be checked when communication between the Ethernet extender pair can be established. IEX-402-VDSL2 provides automatic CO/CPE negotiation functions to auto-pairing, hence enable plug-n-play deployment for the users and eliminating the possible pairing mistake made by users.

Indicators for Onsite Diagnostics

When connections are unstable, SNR (Signal to Noise Ratio) margins and data rates are two of the most useful parameters to determine the root cause of the problem.  It should not need for special DSL diagnostic tools when onsite maintenance or troubleshooting is required. IEX Ethernet extender was designed to display SNR margin and data rate on the device panel to enable easy troubleshooting and maintenance.  For example, if the connection is unstable and the SNR margin indicator is showing a low level, data transmission will likely need to be set to a lower rate. If data rates need to remain relatively high, then the transmission distance will need to be reduced and/or the copper wires will need to be checked for excessive noise or physical damage.

Tools for Remote Management

For efficient DSL Ethernet extender management, a diagnostic utility or a virtual panel should be available to provide remote access to real-time device information, such as port, power, speed, and SNR (Signal to Noise Ratio) statuses. Some managed DSL Ethernet extenders are SNMP-enabled, which allows the devices to be visible on network management software (NMS) to allow total network monitoring. Operators should have tools to perform preliminary diagnostics, adjust configurations, and conduct routine maintenance checks from the control room. Maintenance personnel will only need to be dispatched to onsite locations only when hardware needs to be repaired or replaced.

LFP/LFF (Link Fault Pass-through/Forwarding)

Many network applications nowadays need to ensure that link failures are detected as soon as possible to minimize system downtime. IEX DSL Ethernet extender provides LFP/LFF function which forwards a link failure status to adjacent ports to disabled the link to other network nodes, allowing operators to quickly diagnose the problem and recover the connection. Furthermore, the extenders support inter-operable with Moxa’s millisecond-level network recovery Turbo Ring and Turbo Chain.

IEX-402-VDSL2-T is designed for use in harsh operating environments. The DIN-rail mount, wide operating temperature range (-40 to 75°C), and dual power input make it ideal for installation in industrial applications.


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